It is not as easy as it seems, to find topics to write about. How to do it? To be honest, I have no idea.
My way of collecting topics for the blog is just doing no research about it. That way, I sometimes catch up things to write about. I start by scribbeling down the basic idea and extending it to a normal post. It is impossible to finish every article I started – so I keep a lot of drafts in here, which are cleaned up from time to time.